a(n) = coefficient of 2^(1/3) in the expansion of (1 + 2^(1/3) + 2^(2/3))^n.
A377315
a(n) = coefficient of 2^(1/3) in the expansion of (1 + 2^(1/3) + 2^(2/3))^n.
Terms
- a(0) =0a(1) =1a(2) =4a(3) =15a(4) =58a(5) =223a(6) =858a(7) =3301a(8) =12700a(9) =48861a(10) =187984a(11) =723235a(12) =2782518a(13) =10705243a(14) =41186518a(15) =158457801a(16) =609638200a(17) =2345474521a(18) =9023795964a(19) =34717449655a(20) =133569211378a(21) =513883779063
External references
- oeis: A377315